Keyboard replaced now files won't attach in email

A new keyboard was just installed on my Sony Vaio and now I cannot attach files in email, neither Yahoo nor Gmail will allow me to attach files to an outgoing email message. I am not getting any error messages. The button or link simply does not respond when I click on it to "browse" in Yahoo or to "attach file" in Gmail. I tried two different emails Yahoo & Gmail, and I also logged onto Yahoo from another computer and was able to attach files to outgoing emails, so it has to be the keyboard. I had it installed by a local business (computer tech). Is there something they failed to do--some kind of synchronizing or something?